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Volume 35, Issue 2
Displaying 1-8 of 8 articles from this issue
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[in Japanese]1962 Volume 35 Issue 2 Pages 81
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (92K) -
M. Tanaka, T. Sawata, I. Koshiishi1962 Volume 35 Issue 2 Pages 82-93
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSUsing a Goodrich type flexometer, several anti-aging agents for rubber were investigated for their effectiveness or behavior, that is, the generated temperature, swelling, microscopic structure of a vulcanized natural rubber added with these agents under repeated dynamic compression or under 300% tension stress. The results show that the phenylendiaime base anti-aging agent as predicted effective as an anti-oxidant by Matsuda and Kurihara′s infrared absorption analysis is also effective under dynamic compression deterioration; its assumed good affinity to rubber appears physically favourable as a heat generation under repeated dynamic compression-it is seemed one of the factors retarding the oxidizing deterioration.View full abstractDownload PDF (1977K) -
H. Fukuda, J. Tsurugi1962 Volume 35 Issue 2 Pages 94-98
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSOxydiethyleneaminomethyl-2-thiobenzothiazole (I) was prepared as a representative of aminomethylthio type accelerator. By utilizing diphenylmethane (DPM) as a model of rubber hydrocarbon, reaction of I with DPM, the same reaction in the presence of sulfur and reaction involving I, DPM, sulfur and zinc butyrate were carried out and compared with those of the sulfenamide type accelerator under the corresponding condition. The first step of the reaction of I was found to be its homolytic dissociation into benzothizaole-sulfenyl radical and amine radical etc. Further mechanisms were also deduced to interpret the products in each reaction.View full abstractDownload PDF (443K) -
PART II. MOLECULAR WEIGHT DEPENDENCE OF MECHANICAL DATAK. Ninomiya, H. Miyakoda, E. Maekawa, S. Ido1962 Volume 35 Issue 2 Pages 99-104
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSMolecular weight dependence of mechanical data obtained by using a Mooney Viscometer at a fixed temperature of 100°C was investigated for SBR samples having molecular weights ranging from 1×105 to 8×105.
The following empirical equations were obtained for the time independent constants involved in Eqs. (1), (2) and (3) in the text:
ML0=ζ0[1-(ξ0/Mv)],
τ=φMv3.4,
XL=ζ∞[1-(ζ∞/Mv)],
YL≡ML∞-XL=σMv,
AL∞=δ(Mv-ξ).
Here Mv represents the viscosity average molecular weight of the sample and ζ0, ξ0, φ, ζ∞, ξ∞, σ, δ and ξ are the constants independent of molecular weight. The values of ξ0, ξ∞ and ξ were found to be approximately the same (9×104g/mol).View full abstractDownload PDF (386K) -
STUDY ON TESTING METHODK. Hosoda1962 Volume 35 Issue 2 Pages 105-109
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSThis report deals with the bent-strip test, so called Bell Laboratory Test, of environmental stress cracking of polyethylene.
By this study, p-nonyl phenyl polyoxyethylene ether, which has nine oxyethylene groups, is selected as the most powerful cracking agent, and the influences of the conditions of preparation of test piece, such as the conditions of milling, of press molding and of annealing, are clarified, and also testing conditions of cracking agent of it′s aqueous solution and the temperature of the solution, are decided.View full abstractDownload PDF (354K) -
RELATION BETWEEN ENVIRONMENTAL STRESS CRACKING PROPERTY AND THE OTHER PROPERTIES.K. Hosoda1962 Volume 35 Issue 2 Pages 110-115
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSThis report deals with the relation between the environmental stress cracking property and the other properties, such as density, contact angle to water, melt index, tensile strength, ultimate elongation and molecular structure of several kinds of commercial polyethylene.
By this study, following facts are almost clarified:
With the decrease of density and melt index the resistance for environmental stress cracking increases. And with the increase of contact angle to water, tensile strength, ultimate elongation and the content of methyl group, the resistance for environmental stress cracking increases.View full abstractDownload PDF (661K) -
EFFECT OF COMPOUNDING MATERIALS.K. Hosoda1962 Volume 35 Issue 2 Pages 115-124
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSThis report deals with the effect of several compounding materials, such as liquid materials, surface active materials, high polymers and cross-linking agents, on environmental stress cracking property.
By this study, it is found that the metal soaps and the organic tin oxides, which are composed of two hydrocarbon chains having twelve to eighteen carbons and of one polar group, are very effective compounding material to prevent envronmental stres cracking.iView full abstractDownload PDF (689K) -
[in Japanese]1962 Volume 35 Issue 2 Pages 125-134
Published: 1962
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (841K)
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